Hi Voltaire,
My knee jerk prescription is a combination of Si Miao San, Hoxsey, possibly Xiao Chai Hu Tang, and about 0.1 mg/kg prednisone daily. Tan Yu Tang is a consideration, but is about Phlegm. If the dog strikes you as quite Hot (panting, heat intolerance, thirst, restless at night), the Hoxsey approach is a good way to go.
If we're lucky, Erin Bannink may review this post and let you know what her successes are with Tan Yu Tang, and when she finds it most beneficial.
There's no harm in hedging your bets and using both Tan Yu Tang and Hoxsey. Their actions are sympathetic to each other.
Good luck!
Steve